APU

Question 1

On ground, APU provides bleed air for

Answer 1

Engine starting and air conditioning system

Question 2

APU air intake flap opens when the APU MASTER pb switch is ON/R

Answer 2

APU bleed valve automatically closed above 25,000 ft climbing and reopens at 23,000 ft when descending

Question 3

APU shutdown can be initiated by GND crew using

Answer 3

APU SHUT OFF on external interphone panel or the refueling / de-fueling panel

Question 4

APU Master pb sw ON/R –illuminates

Answer 4

blue ON/R

Question 5

When APU START pb sw is ON, blue light illuminates when

Answer 5

Intake flap is completely open, APU starter is engaged.

Question 6

APU GND operation

Answer 6

14,600 ft

Question 7

Bleed / electrical up to

Answer 7

22,500 ft

Question 8

Electrical power up to

Answer 8

41,450 ft

Question 9

Bleed air extraction 1 pack – 22,500 ft / 2 packs

Answer 9

17,500 ft

Question 10

APU battery restart limit

Answer 10

25,000 ft

Question 11

Air bleed extraction for wing anti ice is

Answer 11

Not permitted

Question 12

After 3 consecutive APU start attemps,

Answer 12

60 min cooling

Question 13

APU Max N

Answer 13

107%

Question 14

APU Max EGT

Answer 14

650 ºC while APU running

Question 15

MAX APU EGT

Answer 15

1,250ºC

Question 16

LOW OIL LEVEL ECAM on ECAM APU page – APU can be

Answer 16

Started and maintenance within next 15 hours

Question 17

Max rotor speed N for APU is

Answer 17

107%

Question 18

After APU started, APU ECAM remains

Answer 18

15 seconds

Question 19

On APU ECAM page, bleed air pressure display is replaced by

Answer 19

Amber xxx when ADIRS 1 is not available or selected OFF

Question 20

LOW OIL LEVEL on APU ECAM when

Answer 20

ECB detects low APU oil level and aircraft on GND, APU not running

Question 21

Walk around – check APU

Answer 21

Access door, air intake, exhaust

Question 22

APU normally started aircraft at

Answer 22

Gate supplied by external power

Question 23

APU start sequence completed ECAM APU page AVAIL appears. APU START pb sw ON extinguishes

Answer 23

And AVAIL illuminates

Question 24

APU running, external power A or B may be kept ON to

Answer 24

Reduce APU load, especially in hot conditions.

Question 25

APU emergency shutdown when pressed

Answer 25

APU FIRE pb, APU SHUTOFF pb, APU EMER SHUT DOWN pb

Question 26

APU automatic shutdown:

Answer 26

Start abort, low oil pressure, high oil temperature

Question 27

APU fire detected on GND,

Answer 27

APU automatic shut down, agent discharge